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US10263256B2ActiveUtilityPatentIndex 72

Spinel type lithium nickel manganese-containing composite oxide

Assignee: MITSUI MINING & SMELTING COPriority: Sep 17, 2015Filed: Sep 16, 2016Granted: Apr 16, 2019
Est. expirySep 17, 2035(~9.2 yrs left)· nominal 20-yr term from priority
Inventors:MITSUMOTO TETSUYAMATSUSHIMA HIDEAKIKAGEI SHINYA
C01G 53/00C01P 2002/88C01P 2006/11C01P 2002/32C01P 2006/40C01P 2004/61C01P 2002/52C01P 2006/12H01M 2004/028H01M 2004/021H01M 10/0525H01M 4/525C01G 53/54H01M 4/505C01G 53/44Y02E60/10
72
PatentIndex Score
4
Cited by
16
References
15
Claims

Abstract

Relating to a 5 V-class spinel type lithium nickel manganese-containing composite oxide having an operating potential of 4.5 V or more with respect to a Li metal reference potential, the present invention proposes a composite oxide being capable of improving cycle properties while suppressing the amount of gas generation under high temperature environments and of increasing thermodynamical stability of a positive electrode in a fully charged state. Proposed is a spinel type lithium nickel manganese-containing composite oxide represented by a general formula [Li(Li a Ni y Mn 2-a-b-y-z-α Ti b Al z M α )O 4-σ ] (where 0<a, 0<b, 0.30≤y<0.60, 0<z, 0≤α, 2-a-b-y-z-α<1.7, 3≤b/a≤8, 0.1<b+z+α, 0<z/b≤1, and M represents one or two or more metal elements selected from the group consisting of Mg, Fe, Co, Ba, Cr, W, Mo, Y, Zr, Nb, and Ce).

Claims

exact text as granted — not AI-modified
The invention claimed is: 
     
       1. A spinel type lithium nickel manganese-containing composite oxide represented by a general formula [Li(Li a Ni y Mn 2-a-b-y-z-α Ti b Al z M α )O 4-σ ] where 0<a, 0<b, 0.30≤y<0.60, 0<z, 0≤α, 2-a-b-y-z-α<1.7, 3≤b/a≤8, 0.1<b+z+α, 0<z/b≤1, and M represents one or two or more metal elements selected from the group consisting of Mg, Fe, Co, Ba, Cr, W, Mo, Y, Zr, Nb, and Ce. 
     
     
       2. A spinel type lithium nickel manganese-containing composite oxide represented by a general formula [Li(Li a Ni y Mn 2-a-b-y-z-α Ti b Al z M α )O 4-σ ] where 0<a≤0.20, 0.08≤b, 0.30≤y<0.60, 0<z<0.15, 0≤α, 2-a-b-y-z-α<1.7, 3≤b/a≤8, 0.1<b+z+α≤0.3, 0<z/b≤1, and M represents one or two or more metal elements selected from the group consisting of Mg, Fe, Co, Ba, Cr, W, Mo, Y, Zr, Nb, and Ce. 
     
     
       3. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein α=0 in the above general formula. 
     
     
       4. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a molar ratio of Al with respect to a molar ratio of Ni (z/y) in the above general formula is more than 0.01. 
     
     
       5. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a molar ratio of Al with respect to a molar ratio of Ti (z/b) in the above general formula is 0<z/b<1. 
     
     
       6. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a sulfur impurity content measured by inductively coupled plasma (ICP) emission spectroscopy is less than 0.20 wt %. 
     
     
       7. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a Na impurity content is less than 300 ppm. 
     
     
       8. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a K impurity content is less than 200 ppm. 
     
     
       9. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a Ca impurity content is less than 150 ppm. 
     
     
       10. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a specific surface area is 0.1 m 2 /g or more and 2.0 m 2 /g or less. 
     
     
       11. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein an average particle diameter (D50) determined by a laser diffraction scattering type particle size distribution measurement method is 4 μm or more and 25 μm or less. 
     
     
       12. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a tap density is 0.9 g/cm 3  or more. 
     
     
       13. The spinel type lithium nickel manganese-containing composite oxide according to  claim 1 , wherein a strain is less than 0.40. 
     
     
       14. A lithium secondary battery having the spinel type lithium nickel manganese-containing composite oxide according to  claim 1  as a positive electrode active material. 
     
     
       15. A lithium secondary battery having the spinel type lithium nickel manganese-containing composite oxide according to  claim 2  as a positive electrode active material.

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